Which one always has a steeper vertical gradient?

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Pyramid of mass

Pyramid of energy

Pyramid of numbers

Pyramid of energy in aquatic ecosystem

answer is B.

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Detailed Solution

Pyramid of energy represents the amount of energy at each trophic level. In any ecosystem, the flow of energy declines as it passes from a lower to the higher trophic level. It is explained by the second law of thermodynamics.

Hence, the pyramid of energy always has an upright or steeper vertical gradient.

In this, the energy decreases from one trophic level to the next trophic level because energy is lost as metabolic heat during transfer of energy. When food energy passes from producers to herbivores, and to carnivores, only 10% of energy is transferred from one trophic level to another trophic level.

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